The Fundamental Conflict in Security

Physical security wants to keep doors locked; life safety codes require doors to be freely openable from the inside. Resolving this tension — keeping unauthorized people out while ensuring occupants can always escape — is the central challenge of locking hardware design. The International Building Code (IBC) Section 1010 governs egress door operation and defines exactly when and how locking hardware is permitted.

The Basic Egress Rule (IBC 1010.1.9)

The default rule is simple: egress doors must be openable from the egress side without the use of a key, a tool, or special knowledge or effort. This means a locked door on an exit must always be openable from the inside with a single motion — a push on a panic bar, a turn of a lever handle, or a push on a push plate. A deadbolt that requires a key from the inside is not permitted on required egress doors.

Panic Hardware (IBC 1010.1.10)

In high-occupancy areas (assembly occupancies, educational occupancies, and others with occupant load over 50 on any door), panic hardware is required. Panic hardware (also called crash bars or exit devices) allows a door to be unlatched by pressing anywhere on the crossbar with a force of no more than 15 pounds. UL 305 is the listing standard for panic hardware.

Panic hardware does not mean the door is always unlocked from the outside. The outside can be secured by a key cylinder, card reader, or other credential. Only the inside egress function must be free.

Delayed Egress Locks (IBC 1010.1.9.7)

Delayed egress locks are permitted in most occupancy types except high-hazard and Groups H and I-2. They hold the door for up to 15 seconds (or 30 seconds where approved by the AHJ) after the egress device is activated, then release. During the delay, an audible alarm sounds. This delay is long enough to deter casual shoplifting (a common retail application) while still allowing emergency egress.

Requirements: the delay function must be listed per UL 294, the door must unlock on fire alarm activation, and a sign must be posted stating "Push Until Alarm Sounds, Door Can Be Opened In 15 Seconds."

Access-Controlled Egress Doors (IBC 1010.1.9.8)

Access-controlled egress doors are allowed where all of these conditions are met:

  • A sensor releases the lock when a person approaches from the egress side (no credential required for egress)
  • A manual release device (push button) is located 40–48 inches AFF within 5 feet of the door
  • The door unlocks upon loss of power and on fire alarm activation
  • The lock is listed per UL 294

This is the code path most commonly used for interior office suites, hospital departments, and data centers. The credential is required only to enter — exiting is always free via the sensor or push button.

Electromagnetic Locks on Egress Doors

Electromagnetic (mag) locks are fail-safe by design — they release when power is cut. On exit doors, mag locks must be integrated with the fire alarm system (to release on alarm), a push-to-exit button or motion sensor on the egress side, and a door position switch. IBC and NFPA 101 both require that the mag lock release within the time allowed for the delayed egress exception if used with a time-delay feature.

Coordination With the AHJ

Access control hardware at egress doors requires AHJ approval before installation. Always submit hardware schedules showing door number, hardware function, UL listings, and code compliance path (which IBC exception applies) for the AHJ to review. On complex facilities, involve the fire marshal early — egress hardware disputes are far more costly to resolve during construction than in the design phase.